David George Lemoine (born May 25, 1957) is an American politician from Maine. Lemoine, a Democrat served in the Maine House of Representatives from 1998 to 2004 prior to serving as the State Treasure
1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin Note: an OTS proof may carry multiple Bitcoin attestations; OTSBitcoinBlock is the earliest confirmed one — a later attestation inside the proof corroborates it and is not a mismatch
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x3cedafec8cea07efd9790b8fedaef109df297c554738e9d93e91b0f85fadc446. Chain 2 (Bitcoin): anchored in block 953620 (2026-06-14T09:36:10Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/1e36befb-0aad-4156-b555-84c1d5dafb52.json and https://artists.proofprofile.net/proofs/artist/1e36befb-0aad-4156-b555-84c1d5dafb52.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).